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<h1 id="sec_name">
<span data-if="hdevelop" style="display:inline;">query_io_interface</span><span data-if="c" style="display:none;">T_query_io_interface</span><span data-if="cpp" style="display:none;">QueryIoInterface</span><span data-if="dotnet" style="display:none;">QueryIoInterface</span><span data-if="python" style="display:none;">query_io_interface</span> (算子名称)</h1>
<h2>名称</h2>
<p><code><span data-if="hdevelop" style="display:inline;">query_io_interface</span><span data-if="c" style="display:none;">T_query_io_interface</span><span data-if="cpp" style="display:none;">QueryIoInterface</span><span data-if="dotnet" style="display:none;">QueryIoInterface</span><span data-if="python" style="display:none;">query_io_interface</span></code> — Query information about the specified I/O device interface.</p>
<h2 id="sec_synopsis">参数签名</h2>
<div data-if="hdevelop" style="display:inline;">
<p>
<code><b>query_io_interface</b>( :  : <a href="#IOInterfaceName"><i>IOInterfaceName</i></a>, <a href="#Query"><i>Query</i></a> : <a href="#Result"><i>Result</i></a>)</code></p>
</div>
<div data-if="c" style="display:none;">
<p>
<code>Herror <b>T_query_io_interface</b>(const Htuple <a href="#IOInterfaceName"><i>IOInterfaceName</i></a>, const Htuple <a href="#Query"><i>Query</i></a>, Htuple* <a href="#Result"><i>Result</i></a>)</code></p>
</div>
<div data-if="cpp" style="display:none;">
<p>
<code>void <b>QueryIoInterface</b>(const HTuple&amp; <a href="#IOInterfaceName"><i>IOInterfaceName</i></a>, const HTuple&amp; <a href="#Query"><i>Query</i></a>, HTuple* <a href="#Result"><i>Result</i></a>)</code></p>
<p>
<code>static <a href="HTuple.html">HTuple</a> <a href="HIODevice.html">HIODevice</a>::<b>QueryIoInterface</b>(const HString&amp; <a href="#IOInterfaceName"><i>IOInterfaceName</i></a>, const HTuple&amp; <a href="#Query"><i>Query</i></a>)</code></p>
<p>
<code>static <a href="HTuple.html">HTuple</a> <a href="HIODevice.html">HIODevice</a>::<b>QueryIoInterface</b>(const HString&amp; <a href="#IOInterfaceName"><i>IOInterfaceName</i></a>, const HString&amp; <a href="#Query"><i>Query</i></a>)</code></p>
<p>
<code>static <a href="HTuple.html">HTuple</a> <a href="HIODevice.html">HIODevice</a>::<b>QueryIoInterface</b>(const char* <a href="#IOInterfaceName"><i>IOInterfaceName</i></a>, const char* <a href="#Query"><i>Query</i></a>)</code></p>
<p>
<code>static <a href="HTuple.html">HTuple</a> <a href="HIODevice.html">HIODevice</a>::<b>QueryIoInterface</b>(const wchar_t* <a href="#IOInterfaceName"><i>IOInterfaceName</i></a>, const wchar_t* <a href="#Query"><i>Query</i></a>)  <span class="signnote">
            (
            Windows only)
          </span></code></p>
</div>
<div data-if="com" style="display:none;"></div>
<div data-if="dotnet" style="display:none;">
<p>
<code>static void <a href="HOperatorSet.html">HOperatorSet</a>.<b>QueryIoInterface</b>(<a href="HTuple.html">HTuple</a> <a href="#IOInterfaceName"><i>IOInterfaceName</i></a>, <a href="HTuple.html">HTuple</a> <a href="#Query"><i>query</i></a>, out <a href="HTuple.html">HTuple</a> <a href="#Result"><i>result</i></a>)</code></p>
<p>
<code>static <a href="HTuple.html">HTuple</a> <a href="HIODevice.html">HIODevice</a>.<b>QueryIoInterface</b>(string <a href="#IOInterfaceName"><i>IOInterfaceName</i></a>, <a href="HTuple.html">HTuple</a> <a href="#Query"><i>query</i></a>)</code></p>
<p>
<code>static <a href="HTuple.html">HTuple</a> <a href="HIODevice.html">HIODevice</a>.<b>QueryIoInterface</b>(string <a href="#IOInterfaceName"><i>IOInterfaceName</i></a>, string <a href="#Query"><i>query</i></a>)</code></p>
</div>
<div data-if="python" style="display:none;">
<p>
<code>def <b>query_io_interface</b>(<a href="#IOInterfaceName"><i>iointerface_name</i></a>: str, <a href="#Query"><i>query</i></a>: MaybeSequence[str]) -&gt; Sequence[Union[int, float, str]]</code></p>
</div>
<h2 id="sec_description">描述</h2>
<p>该算子 <code><span data-if="hdevelop" style="display:inline">query_io_interface</span><span data-if="c" style="display:none">query_io_interface</span><span data-if="cpp" style="display:none">QueryIoInterface</span><span data-if="com" style="display:none">QueryIoInterface</span><span data-if="dotnet" style="display:none">QueryIoInterface</span><span data-if="python" style="display:none">query_io_interface</span></code> returns information about
the I/O device interface <a href="#IOInterfaceName"><i><code><span data-if="hdevelop" style="display:inline">IOInterfaceName</span><span data-if="c" style="display:none">IOInterfaceName</span><span data-if="cpp" style="display:none">IOInterfaceName</span><span data-if="com" style="display:none">IOInterfaceName</span><span data-if="dotnet" style="display:none">IOInterfaceName</span><span data-if="python" style="display:none">iointerface_name</span></code></i></a>. The desired
information is specified via  <a href="#Query"><i><code><span data-if="hdevelop" style="display:inline">Query</span><span data-if="c" style="display:none">Query</span><span data-if="cpp" style="display:none">Query</span><span data-if="com" style="display:none">Query</span><span data-if="dotnet" style="display:none">query</span><span data-if="python" style="display:none">query</span></code></i></a>. If applicable,
<a href="#Result"><i><code><span data-if="hdevelop" style="display:inline">Result</span><span data-if="c" style="display:none">Result</span><span data-if="cpp" style="display:none">Result</span><span data-if="com" style="display:none">Result</span><span data-if="dotnet" style="display:none">result</span><span data-if="python" style="display:none">result</span></code></i></a> contains a list of supported values.
</p>
<p>Generally, when passing the value <i><span data-if="hdevelop" style="display:inline">'interface_name'</span><span data-if="c" style="display:none">"interface_name"</span><span data-if="cpp" style="display:none">"interface_name"</span><span data-if="com" style="display:none">"interface_name"</span><span data-if="dotnet" style="display:none">"interface_name"</span><span data-if="python" style="display:none">"interface_name"</span></i> for
<a href="#Query"><i><code><span data-if="hdevelop" style="display:inline">Query</span><span data-if="c" style="display:none">Query</span><span data-if="cpp" style="display:none">Query</span><span data-if="com" style="display:none">Query</span><span data-if="dotnet" style="display:none">query</span><span data-if="python" style="display:none">query</span></code></i></a>, all available I/O interfaces are returned. The value
of the parameter <a href="#IOInterfaceName"><i><code><span data-if="hdevelop" style="display:inline">IOInterfaceName</span><span data-if="c" style="display:none">IOInterfaceName</span><span data-if="cpp" style="display:none">IOInterfaceName</span><span data-if="com" style="display:none">IOInterfaceName</span><span data-if="dotnet" style="display:none">IOInterfaceName</span><span data-if="python" style="display:none">iointerface_name</span></code></i></a> is ignored in this case.
</p>
<p>Please check the directory <code>doc/html/reference/io</code>
for documentation about your specific I/O device interface, where
all supported interface specific parameters are listed.
</p>
<h2 id="sec_attention">注意</h2>
<p>On Windows Systems, error dialog boxes from the operating system can occur
when dependency modules of the interface are not found, e.g., the according
SDK was not installed. The occurrence of the error boxes can be controlled by
setting Windows' Error Mode. Please refer to the description of SetErrorMode
within the Windows MSDN documentation.
</p>
<h2 id="sec_execution">运行信息</h2>
<ul>
  <li>多线程类型:可重入(与非独占操作符并行运行)。</li>
<li>多线程作用域:全局(可以从任何线程调用)。</li>
  <li>未经并行化处理。</li>
</ul>
<h2 id="sec_parameters">参数表</h2>
  <div class="par">
<div class="parhead">
<span id="IOInterfaceName" class="parname"><b><code><span data-if="hdevelop" style="display:inline">IOInterfaceName</span><span data-if="c" style="display:none">IOInterfaceName</span><span data-if="cpp" style="display:none">IOInterfaceName</span><span data-if="com" style="display:none">IOInterfaceName</span><span data-if="dotnet" style="display:none">IOInterfaceName</span><span data-if="python" style="display:none">iointerface_name</span></code></b> (input_control)  </span><span>string <code>→</code> <span data-if="dotnet" style="display:none"><a href="HTuple.html">HTuple</a></span><span data-if="python" style="display:none">str</span><span data-if="cpp" style="display:none"><a href="HTuple.html">HTuple</a></span><span data-if="c" style="display:none">Htuple</span><span data-if="hdevelop" style="display:inline"> (string)</span><span data-if="dotnet" style="display:none"> (<i>string</i>)</span><span data-if="cpp" style="display:none"> (<i>HString</i>)</span><span data-if="c" style="display:none"> (<i>char*</i>)</span></span>
</div>
<p class="pardesc">HALCON I/O interface name.</p>
<p class="pardesc"><span class="parcat">Default:
      </span>[]</p>
<p class="pardesc"><span class="parcat">Suggested values:
      </span><span data-if="hdevelop" style="display:inline">'ADLINK-DAQPilot'</span><span data-if="c" style="display:none">"ADLINK-DAQPilot"</span><span data-if="cpp" style="display:none">"ADLINK-DAQPilot"</span><span data-if="com" style="display:none">"ADLINK-DAQPilot"</span><span data-if="dotnet" style="display:none">"ADLINK-DAQPilot"</span><span data-if="python" style="display:none">"ADLINK-DAQPilot"</span>, <span data-if="hdevelop" style="display:inline">'ADLINK-EOS'</span><span data-if="c" style="display:none">"ADLINK-EOS"</span><span data-if="cpp" style="display:none">"ADLINK-EOS"</span><span data-if="com" style="display:none">"ADLINK-EOS"</span><span data-if="dotnet" style="display:none">"ADLINK-EOS"</span><span data-if="python" style="display:none">"ADLINK-EOS"</span>, <span data-if="hdevelop" style="display:inline">'Advantech'</span><span data-if="c" style="display:none">"Advantech"</span><span data-if="cpp" style="display:none">"Advantech"</span><span data-if="com" style="display:none">"Advantech"</span><span data-if="dotnet" style="display:none">"Advantech"</span><span data-if="python" style="display:none">"Advantech"</span>, <span data-if="hdevelop" style="display:inline">'Contec'</span><span data-if="c" style="display:none">"Contec"</span><span data-if="cpp" style="display:none">"Contec"</span><span data-if="com" style="display:none">"Contec"</span><span data-if="dotnet" style="display:none">"Contec"</span><span data-if="python" style="display:none">"Contec"</span>, <span data-if="hdevelop" style="display:inline">'Hilscher-cifX'</span><span data-if="c" style="display:none">"Hilscher-cifX"</span><span data-if="cpp" style="display:none">"Hilscher-cifX"</span><span data-if="com" style="display:none">"Hilscher-cifX"</span><span data-if="dotnet" style="display:none">"Hilscher-cifX"</span><span data-if="python" style="display:none">"Hilscher-cifX"</span>, <span data-if="hdevelop" style="display:inline">'Interface'</span><span data-if="c" style="display:none">"Interface"</span><span data-if="cpp" style="display:none">"Interface"</span><span data-if="com" style="display:none">"Interface"</span><span data-if="dotnet" style="display:none">"Interface"</span><span data-if="python" style="display:none">"Interface"</span>, <span data-if="hdevelop" style="display:inline">'Linux-GPIO'</span><span data-if="c" style="display:none">"Linux-GPIO"</span><span data-if="cpp" style="display:none">"Linux-GPIO"</span><span data-if="com" style="display:none">"Linux-GPIO"</span><span data-if="dotnet" style="display:none">"Linux-GPIO"</span><span data-if="python" style="display:none">"Linux-GPIO"</span>, <span data-if="hdevelop" style="display:inline">'NIDAQmx'</span><span data-if="c" style="display:none">"NIDAQmx"</span><span data-if="cpp" style="display:none">"NIDAQmx"</span><span data-if="com" style="display:none">"NIDAQmx"</span><span data-if="dotnet" style="display:none">"NIDAQmx"</span><span data-if="python" style="display:none">"NIDAQmx"</span>, <span data-if="hdevelop" style="display:inline">'OPC_Classic'</span><span data-if="c" style="display:none">"OPC_Classic"</span><span data-if="cpp" style="display:none">"OPC_Classic"</span><span data-if="com" style="display:none">"OPC_Classic"</span><span data-if="dotnet" style="display:none">"OPC_Classic"</span><span data-if="python" style="display:none">"OPC_Classic"</span>, <span data-if="hdevelop" style="display:inline">'OPC_UA'</span><span data-if="c" style="display:none">"OPC_UA"</span><span data-if="cpp" style="display:none">"OPC_UA"</span><span data-if="com" style="display:none">"OPC_UA"</span><span data-if="dotnet" style="display:none">"OPC_UA"</span><span data-if="python" style="display:none">"OPC_UA"</span></p>
</div>
  <div class="par">
<div class="parhead">
<span id="Query" class="parname"><b><code><span data-if="hdevelop" style="display:inline">Query</span><span data-if="c" style="display:none">Query</span><span data-if="cpp" style="display:none">Query</span><span data-if="com" style="display:none">Query</span><span data-if="dotnet" style="display:none">query</span><span data-if="python" style="display:none">query</span></code></b> (input_control)  </span><span>string(-array) <code>→</code> <span data-if="dotnet" style="display:none"><a href="HTuple.html">HTuple</a></span><span data-if="python" style="display:none">MaybeSequence[str]</span><span data-if="cpp" style="display:none"><a href="HTuple.html">HTuple</a></span><span data-if="c" style="display:none">Htuple</span><span data-if="hdevelop" style="display:inline"> (string)</span><span data-if="dotnet" style="display:none"> (<i>string</i>)</span><span data-if="cpp" style="display:none"> (<i>HString</i>)</span><span data-if="c" style="display:none"> (<i>char*</i>)</span></span>
</div>
<p class="pardesc">Parameter name of the query.</p>
<p class="pardesc"><span class="parcat">Default:
      </span>
    <span data-if="hdevelop" style="display:inline">'io_device_names'</span>
    <span data-if="c" style="display:none">"io_device_names"</span>
    <span data-if="cpp" style="display:none">"io_device_names"</span>
    <span data-if="com" style="display:none">"io_device_names"</span>
    <span data-if="dotnet" style="display:none">"io_device_names"</span>
    <span data-if="python" style="display:none">"io_device_names"</span>
</p>
<p class="pardesc"><span class="parcat">Suggested values:
      </span><span data-if="hdevelop" style="display:inline">'interface_name'</span><span data-if="c" style="display:none">"interface_name"</span><span data-if="cpp" style="display:none">"interface_name"</span><span data-if="com" style="display:none">"interface_name"</span><span data-if="dotnet" style="display:none">"interface_name"</span><span data-if="python" style="display:none">"interface_name"</span>, <span data-if="hdevelop" style="display:inline">'io_device_names'</span><span data-if="c" style="display:none">"io_device_names"</span><span data-if="cpp" style="display:none">"io_device_names"</span><span data-if="com" style="display:none">"io_device_names"</span><span data-if="dotnet" style="display:none">"io_device_names"</span><span data-if="python" style="display:none">"io_device_names"</span>, <span data-if="hdevelop" style="display:inline">'param_name'</span><span data-if="c" style="display:none">"param_name"</span><span data-if="cpp" style="display:none">"param_name"</span><span data-if="com" style="display:none">"param_name"</span><span data-if="dotnet" style="display:none">"param_name"</span><span data-if="python" style="display:none">"param_name"</span>, <span data-if="hdevelop" style="display:inline">'revision'</span><span data-if="c" style="display:none">"revision"</span><span data-if="cpp" style="display:none">"revision"</span><span data-if="com" style="display:none">"revision"</span><span data-if="dotnet" style="display:none">"revision"</span><span data-if="python" style="display:none">"revision"</span></p>
</div>
  <div class="par">
<div class="parhead">
<span id="Result" class="parname"><b><code><span data-if="hdevelop" style="display:inline">Result</span><span data-if="c" style="display:none">Result</span><span data-if="cpp" style="display:none">Result</span><span data-if="com" style="display:none">Result</span><span data-if="dotnet" style="display:none">result</span><span data-if="python" style="display:none">result</span></code></b> (output_control)  </span><span>string-array <code>→</code> <span data-if="dotnet" style="display:none"><a href="HTuple.html">HTuple</a></span><span data-if="python" style="display:none">Sequence[Union[int, float, str]]</span><span data-if="cpp" style="display:none"><a href="HTuple.html">HTuple</a></span><span data-if="c" style="display:none">Htuple</span><span data-if="hdevelop" style="display:inline"> (string / </span><span data-if="hdevelop" style="display:inline">integer / </span><span data-if="hdevelop" style="display:inline">real)</span><span data-if="dotnet" style="display:none"> (<i>string</i> / </span><span data-if="dotnet" style="display:none">int / </span><span data-if="dotnet" style="display:none">long / </span><span data-if="dotnet" style="display:none">double)</span><span data-if="cpp" style="display:none"> (<i>HString</i> / </span><span data-if="cpp" style="display:none">Hlong / </span><span data-if="cpp" style="display:none">double)</span><span data-if="c" style="display:none"> (<i>char*</i> / </span><span data-if="c" style="display:none">Hlong / </span><span data-if="c" style="display:none">double)</span></span>
</div>
<p class="pardesc">List of result values (according to <a href="#Query"><i><code><span data-if="hdevelop" style="display:inline">Query</span><span data-if="c" style="display:none">Query</span><span data-if="cpp" style="display:none">Query</span><span data-if="com" style="display:none">Query</span><span data-if="dotnet" style="display:none">query</span><span data-if="python" style="display:none">query</span></code></i></a>).</p>
</div>
<h2 id="sec_example_all">例程 (HDevelop)</h2>
<pre class="example">
* Select a suitable i/o device interface of name IOInterfaceName
query_io_interface (IOInterfaceName, 'io_device_names', DeviceNames)
open_io_device (IOInterfaceName, DeviceNames[0], [], [], IODeviceHandle)
query_io_device (IODeviceHandle, [], 'io_channel_names.digital_input', \
                 ChannelInputNames)
open_io_channel (IODeviceHandle, ChannelInputNames[0], [], [], \
                 IOChannelHandle)
read_io_channel (IOChannelHandle, Value, Status)
</pre>
<h2 id="sec_result">结果</h2>
<p>如果参数均有效，算子
<code><span data-if="hdevelop" style="display:inline">query_io_interface</span><span data-if="c" style="display:none">query_io_interface</span><span data-if="cpp" style="display:none">QueryIoInterface</span><span data-if="com" style="display:none">QueryIoInterface</span><span data-if="dotnet" style="display:none">QueryIoInterface</span><span data-if="python" style="display:none">query_io_interface</span></code> 返回值 <TT>2</TT> (
      <TT>H_MSG_TRUE</TT>)
    .  If necessary an
exception is raised. In this case, an extended error information may be
set and can be queried with 该算子 <a href="get_extended_error_info.html"><code><span data-if="hdevelop" style="display:inline">get_extended_error_info</span><span data-if="c" style="display:none">get_extended_error_info</span><span data-if="cpp" style="display:none">GetExtendedErrorInfo</span><span data-if="com" style="display:none">GetExtendedErrorInfo</span><span data-if="dotnet" style="display:none">GetExtendedErrorInfo</span><span data-if="python" style="display:none">get_extended_error_info</span></code></a>.
</p>
<h2 id="sec_successors">可能的后置算子</h2>
<p>
<code><a href="open_io_device.html"><span data-if="hdevelop" style="display:inline">open_io_device</span><span data-if="c" style="display:none">open_io_device</span><span data-if="cpp" style="display:none">OpenIoDevice</span><span data-if="com" style="display:none">OpenIoDevice</span><span data-if="dotnet" style="display:none">OpenIoDevice</span><span data-if="python" style="display:none">open_io_device</span></a></code>
</p>
<h2 id="sec_module">模块</h2>
<p>
Foundation</p>
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